EP2441306B1 - Apparatuses and methods for communicating downlink information - Google Patents

Apparatuses and methods for communicating downlink information Download PDF

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Publication number
EP2441306B1
EP2441306B1 EP10737678.2A EP10737678A EP2441306B1 EP 2441306 B1 EP2441306 B1 EP 2441306B1 EP 10737678 A EP10737678 A EP 10737678A EP 2441306 B1 EP2441306 B1 EP 2441306B1
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EP
European Patent Office
Prior art keywords
information
selected downlink
downlink information
function
receiving
Prior art date
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Active
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EP10737678.2A
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German (de)
English (en)
French (fr)
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EP2441306A2 (en
Inventor
Tao Luo
Yongbin Wei
Durga Prasad Malladi
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Qualcomm Inc
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • the following description relates to wireless communications, in general, and to systems, methods and apparatus for sending information in wireless communication systems, in particular.
  • Wireless communication systems are widely deployed to provide various types of communication. For instance, voice and/or data can be provided via such wireless communication systems.
  • a typical wireless communication system, or network can provide multiple users access to one or more shared resources (e.g., bandwidth, transmit power).
  • shared resources e.g., bandwidth, transmit power.
  • a system can use a variety of multiple access techniques such as Frequency Division Multiplexing (FDM), Time Division Multiplexing (TDM), Code Division Multiplexing (CDM), Orthogonal Frequency Division Multiplexing (OFDM), and others.
  • FDM Frequency Division Multiplexing
  • TDM Time Division Multiplexing
  • CDM Code Division Multiplexing
  • OFDM Orthogonal Frequency Division Multiplexing
  • wireless multiple access communication systems can simultaneously support communication for multiple user equipment (UEs).
  • UEs user equipment
  • Each UE can communicate with one or more base stations (BSs) via transmissions on forward and reverse links.
  • the forward link or downlink (DL)
  • DL downlink
  • UL uplink
  • the BS in the cell can conduct balance loading by offloading one or more UEs from one cell to a different cell.
  • the UE may experience difficulty in decoding system and/or paging information on the DL, which is typically transmitted over the DL shared data channel.
  • the UE cannot decode the DL control channel.
  • the DL control channels including, but not limited to, the Physical Control Format Indicator Channel (PCFICH) and the Physical Downlink Control Channel (PDCCH), can signal how many control symbols are used in each transmission timing interval (TTI) and/or the resource allocation for the associated DL data channels.
  • PCFICH Physical Control Format Indicator Channel
  • PDCCH Physical Downlink Control Channel
  • the PDCCH format 1A or 1C can be used to signal resource allocation for paging, system information updates and/or random access responses.
  • a limited number of payload sizes have been specified for those cases, and Quadrature Phase Shift Keying (QPSK) modulation can be used regardless of the modulation and coding scheme (MCS).
  • QPSK Quadrature Phase Shift Keying
  • MCS modulation and coding scheme
  • the UE may apply interference cancellation or other advanced receiver to decode control and data.
  • this solution requires the UE to decode the control channel to decode the data channel. Accordingly, due to such requirements, novel systems, apparatus and methods for sending information in wireless communication systems are therefore desirable.
  • 3rd Generation Partnership Project Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 8)
  • 3GPP TS 36.213 V8.7.0 (2009-05 ) specifies and establishes the characteristics of the physicals layer procedures in the FDD and TDD modes of E-UTRA.
  • 3rd Generation Partnership Project Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Services provided by the physical layer (Release 8)
  • 3GPP TS 36.302 V8.1.0 (2009-03 ) specifies the services provided by the physical layer.
  • CoMP coordinated multi-point
  • a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and/or the computing device can be a component.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer-readable media having various data structures stored thereon.
  • the components can communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems by way of the signal).
  • a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems by way of the signal).
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier-frequency division multiple access
  • a CDMA system can implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA8020, etc.
  • UTRA includes Wideband-CDMA (W-CDMA) and other variants of CDMA.
  • CDMA8020 covers IS-8020, IS-95 and IS-856 standards.
  • An OFDMA system can implement a radio technology such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • WiMAX IEEE 802.16
  • Flash-OFDM Flash-OFDM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS).
  • UMTS Universal Mobile Telecommunication System
  • 3GPP Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA, which employs OFDMA on the downlink and SC-FDMA on the uplink.
  • UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).
  • CDMA8020 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).
  • 3GPP2 3rd Generation Partnership Project 2
  • such wireless communication systems can additionally include peer-to-peer (e.g., mobile-to-mobile) ad hoc network systems often using unpaired unlicensed spectrums, 802.xx wireless LAN, BLUETOOTH and any other short- or long- range, wireless communication techniques.
  • SC-FDMA Single carrier frequency division multiple access
  • SC-FDMA utilizes single carrier modulation and frequency domain equalization.
  • SC-FDMA can have similar performance and essentially the same overall complexity as those of an OFDMA system.
  • a SC-FDMA signal can have lower peak-to-average power ratio (PAPR) because of its inherent single carrier structure.
  • PAPR peak-to-average power ratio
  • SC-FDMA can be used, for instance, in uplink communications where lower PAPR greatly benefits UEs in terms of transmit power efficiency.
  • SC-FDMA can be implemented as an uplink multiple access scheme in 3GPP Long Term Evolution (LTE) or Evolved UTRA.
  • LTE Long Term Evolution
  • Evolved UTRA 3GPP Long Term Evolution
  • a UE can also be called a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, mobile device, access terminal, wireless communication device, user agent or user device.
  • a UE can be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device having wireless connection capability, computing device, or other processing device connected to a wireless modem.
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • a BS can be utilized for communicating with UEs and can also be referred to as an access point, BS, Femto node, Pico Node, Node B, Evolved Node B (eNodeB, eNB) or some other terminology.
  • BS access point
  • Femto node Femto node
  • Pico Node Node B
  • eNodeB Evolved Node B
  • the term "or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless specified otherwise, or clear from the context, the phrase “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, the phrase “X employs A or B” is satisfied by any of the following instances: X employs A; X employs B; or X employs both A and B.
  • the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless specified otherwise or clear from the context to be directed to a singular form.
  • Computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips), optical disks (e.g., compact disk (CD), digital versatile disk (DVD)), smart cards, and flash memory devices (e.g., EPROM, card, stick, key drive).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • machine-readable medium can include, without being limited to, wireless channels and various other media (and/or storage media) capable of storing, containing, and/or carrying codes and/or instruction(s) and/or data.
  • the teachings herein may be employed in a network that includes macro scale coverage (e.g., a large area cellular network such as a 3G networks, typically referred to as a macro cell network) and smaller scale coverage (e.g., a residence-based or building-based network environment).
  • macro scale coverage e.g., a large area cellular network such as a 3G networks, typically referred to as a macro cell network
  • smaller scale coverage e.g., a residence-based or building-based network environment.
  • a UE moves through such a network.
  • the UE may be served in certain locations by BSs that provide macro coverage while the UE may be served at other locations by BSs that provide smaller scale coverage.
  • the smaller coverage nodes may be used to provide incremental capacity growth, in-building coverage, and different services (e.g., for a more robust user experience).
  • a node that provides coverage over a relatively large area may be referred to as a Macro node.
  • a node that provides coverage over a relatively small area e.g., a residence
  • a Femto node e.g., a relatively small area
  • a node that provides coverage over an area that is smaller than a macro area and larger than a Femto area may be referred to as a Pico node (e.g., providing coverage within a commercial building).
  • a cell associated with a Macro node, a Femto node, or a Pico node may be referred to as a macro cell, a Femto cell, or a Pico cell, respectively.
  • each cell may be further associated with (e.g., divided into) one or more sectors.
  • a Macro node may be configured or referred to as a BS, access point, eNodeB, macro cell, and so on.
  • a Femto node may be configured or referred to as a Home NodeB, Home eNodeB, access point access node, a BS, a Femto cell, and so on.
  • FIG. 1 is an illustration of an example wireless communication system facilitating communication of DL information in accordance with various aspects set forth herein.
  • interference caused by transmissions on the UL can be managed by the BS 102 while interference caused by transmissions on the DL can be managed by the UEs 116, 122.
  • System 100 includes a BS 102 that can include multiple antenna groups.
  • one antenna group can include antennas 104, 106, another group can comprise antennas 108, 110, and an additional group can include antennas 112, 114.
  • Two antennas are illustrated for each antenna group; however, more or fewer antennas can be utilized for each group.
  • BS 102 can additionally include a transmitting node chain and a receiving node chain, each of which can in turn comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas), as will be appreciated by one skilled in the art.
  • BS 102 can communicate with one or more UEs such as UE 116, 122. However, it is to be appreciated that BS 102 can communicate with substantially any number of UEs similar to UEs 116, 122.
  • UEs 116, 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.
  • UE 116 is in communication with antennas 112, 114, where antennas 112, 114 transmit information to UE 116 over DL 118 and receive information from UE 116 over a UL 120.
  • UE 122 is in communication with antennas 104, 106, where antennas 104, 106 transmit information to UE 122 over a DL 124 and receive information from UE 122 over a UL 126.
  • DL 118 can utilize a different frequency band than that used by UL 120
  • DL 124 can employ a different frequency band than that employed by UL 126, for example.
  • TDD time division duplex
  • DL 118 and UL 120 can utilize a common frequency band and DL 124 and UL 126 can utilize a common frequency band.
  • Each group of antennas and/or the area in which they are designated to communicate can be referred to as a sector of BS 102.
  • antenna groups can be designed to communicate to UEs in a sector of the areas covered by BS 102.
  • the transmitting antennas of BS 102 can utilize beamforming to improve signal-to-noise ratio of DLs 118, 124 for UEs 116, 122.
  • BS 102 utilizes beamforming to transmit to UEs 116, 122 scattered randomly through an associated coverage
  • UEs 116, 122 in neighboring cells can be subject to less interference as compared to a BS transmitting through a single antenna to all its UEs.
  • the BS 102 and UEs 116, 122 can be configured providing configuration of scheduling policy for facilitating distributed scheduling as described herein.
  • FIG. 2 is an illustration of another example wireless communication system facilitating communication of DL information in accordance with various aspects set forth herein.
  • the system 200 provides communication for multiple cells 202, such as, for example, macro cells 202A - 202G, with each cell being serviced by a corresponding BS 204 (e.g., BS 204A - 204G).
  • BS 204 e.g., BS 204A - 204G
  • UE 206 e.g., UEs 206A - 206L
  • Each UE 206 can communicate with one or more BS 204 on a DL or a UL at a given moment, depending upon whether the UE 206 is active and whether it is in soft handoff, for example.
  • the wireless communication system 200 may provide service over a large geographic region. For example, macro cells 202A-202G may cover a few blocks in a neighborhood.
  • FIG. 3 is an illustration of an example wireless communication system where one or more Femto nodes are deployed for facilitating communication of DL information in accordance with various aspects set forth herein.
  • the system 300 includes multiple Femto nodes 310 (e.g., Femto nodes 310A and 310B) installed in a relatively small scale network environment (e.g., in one or more user residences 330).
  • Each Femto node 310 can be coupled to a wide area network 340 (e.g., the Internet) and a mobile operator core network 350 via a DSL router, a cable modem, a wireless link, or other connectivity means (not shown).
  • a wide area network 340 e.g., the Internet
  • a mobile operator core network 350 via a DSL router, a cable modem, a wireless link, or other connectivity means (not shown).
  • each Femto node 310 can be configured to serve associated UEs (e.g., associated UE 320A) and, optionally, alien UEs (e.g., alien UE 320B).
  • access to Femto nodes 310 may be restricted whereby a given UE 320 can be served by a set of designated (e.g., home) Femto node(s) 310 but may not be served by any non-designated Femto nodes 310 (e.g., a neighbor's Femto node 310).
  • an associated UE 320A can experience interference on the DL from a Femto node 310 serving an alien UE 320B.
  • a Femto node 310 associated with associated UE 320A can experience interference on the UL from the alien UE 320B.
  • interference management can be facilitated in the system 300 as described herein.
  • FIG. 4 is an illustration of an example coverage map in a wireless communication system for facilitating communication of DL information in accordance with various aspects set forth herein.
  • the coverage map 400 can include several tracking areas 402 (or routing areas or location areas), each of which can include several macro coverage areas.
  • areas of coverage associated with tracking areas 402A, 402B, and 402C are delineated by the wide lines and the macro coverage areas 404 are represented by the hexagons.
  • the tracking areas 402A, 402B, and 402C can include Femto coverage areas 406.
  • each of the Femto coverage areas 406 is depicted within a macro coverage area 404 (e.g., macro coverage area 404B).
  • a Femto coverage area 406 may not lie entirely within a macro coverage area 404.
  • a large number of Femto coverage areas 406 can be defined with a given tracking area 402 or macro coverage area 404.
  • one or more Pico coverage areas (not shown) can be defined within a given tracking area 402 or macro coverage area 404.
  • the owner of a Femto node 310 can subscribe to mobile service, such as, for example, 3G mobile service, offered through the mobile operator core network 350.
  • a UE 320 may be capable of operating both in macro environments and in smaller scale (e.g., residential) network environments. In other words, depending on the current location of the UE 320, the UE 320 may be served by an access node 360 of the mobile operator core network 350 or by any one of a set of Femto nodes 310 (e.g., the Femto nodes 310A and 310B that reside within a corresponding user residence 330).
  • a Femto node 310 may be backward compatible with existing UEs 320.
  • a Femto node 310 may be deployed on a single frequency or, in the alternative, on multiple frequencies. Depending on the particular configuration, the single frequency or one or more of the multiple frequencies can overlap with one or more frequencies used by a Macro node (e.g., node 360).
  • a Macro node e.g., node 360
  • a UE 320 can be configured to connect to a preferred Femto node (e.g., the home Femto node of the UE 320) whenever such connectivity is possible. For example, whenever the UE 320 is within the user residence 330, it may be desired that the UE 320 communicate only with the home Femto node 310.
  • a preferred Femto node e.g., the home Femto node of the UE 320
  • the UE 320 may continue to search for the most preferred network (e.g., the preferred Femto node 310) using a Better System Reselection (BSR), which can involve a periodic scanning of available systems to determine whether better systems are currently available, and subsequent efforts to associate with such preferred systems.
  • BSR Better System Reselection
  • the UE 320 may limit the search for specific band and channel. For example, the search for the most preferred system may be repeated periodically.
  • the UE 320 selects the Femto node 310 for camping within its coverage area.
  • a Femto node may be restricted in some aspects. For example, a given Femto node may only provide certain services to certain UEs. In deployments with so-called restricted (or closed) association, a given UE may only be served by the macro cell mobile network and a defined set of Femto nodes (e.g., the Femto nodes 310 that reside within the corresponding user residence 330). In some implementations, a node may be restricted to not provide, for at least one node, at least one of: signaling, data access, registration, paging, or service.
  • a restricted Femto node (which may also be referred to as a Closed Subscriber Group Home NodeB) is one that provides service to a restricted provisioned set of UEs. This set may be temporarily or permanently extended as necessary.
  • a Closed Subscriber Group (CSG) may be defined as the set of BSs (e.g., Femto nodes) that share a common access control list of UEs.
  • a channel on which all Femto nodes (or all restricted Femto nodes) in a region operate may be referred to as a Femto channel.
  • an open Femto node may refer to a Femto node with no restricted association.
  • a restricted Femto node may refer to a Femto node that is restricted in some manner (e.g., restricted for association and/or registration).
  • a home Femto node may refer to a Femto node on which the UE is authorized to access and operate on.
  • a guest Femto node may refer to a Femto node on which a UE is temporarily authorized to access or operate on.
  • An alien Femto node may refer to a Femto node on which the UE is not authorized to access or operate on, except for perhaps emergency situations (e.g., 911 calls).
  • a home UE may refer to a UE that authorized to access the restricted Femto node.
  • a guest UE may refer to a UE with temporary access to the restricted Femto node.
  • An alien UE may refer to a UE that does not have permission to access the restricted Femto node, except for perhaps emergency situations, for example, such as 911 calls (e.g., a UE that does not have the credentials or permission to register with the restricted Femto node).
  • a Pico node may provide the same or similar functionality for a larger coverage area.
  • a Pico node may be restricted, a home Pico node may be defined for a given UE, and so on.
  • a wireless multiple-access communication system can simultaneously support communication for multiple wireless UEs.
  • each UE can communicate with one or more BSs via transmissions on the DL or the UL.
  • These communication links i.e., DL and UL
  • DL and UL may be established via a single-in-single-out system, a multiple-in-multiple-out (MIMO) system, or some other type of system.
  • MIMO multiple-in-multiple-out
  • a MIMO system employs multiple ( N T ) transmit antennas and multiple ( N R ) receive antennas for data transmission.
  • a MIMO channel formed by the N T transmit and N R receive antennas may be decomposed into N S independent channels, which are also referred to as spatial channels, where N S ⁇ min ⁇ N T , N R ⁇ .
  • Each of the N S independent channels corresponds to a dimension.
  • the MIMO system may provide improved performance (e.g., higher throughput and/or greater reliability) if the additional dimensionalities created by the multiple transmit and receive antennas are utilized.
  • a MIMO system can support TDD and FDD.
  • the DL and UL transmissions can be on the same frequency region so that the reciprocity principle allows the estimation of the DL channel from the UL. This enables the BS to transmit beam-forming gain on the DL when multiple antennas are available at the BS.
  • the channel conditions of the UL channel can be estimated from the DL channel, for interference management, as described herein.
  • FIG. 5 is an illustration of an example block diagram of a wireless communication system for facilitating communication of DL information in accordance with various aspects set forth herein.
  • the BSs 502, 522 can enable or disable a function enabling the BSs 502, 522 to send DL system information, paging information, unicast data information and/or a random access response without using control channel information.
  • the UEs 504, 524 that receive the DL information do not need to decode control channels to decode a corresponding data channel.
  • the BSs 502, 522 can transmit control information for paging information and/or system information as in LTE Release 8 systems.
  • the wireless communication system 500 can include BSs 502, 522 and UEs 504, 524 served by BS 502, 522, respectively.
  • BSs 502, 522 can be located in different cells in various embodiments transmit paging, system and/or unicast data information at one or more locations based on one or more of any combinations of a cell identity, a system frame number, a cyclic prefix type, a number of transmit antenna, and/or a closed subscriber group flag.
  • the BS 502, 522 transmits the information at a plurality of locations.
  • the locations to which the information is transmitted can be unique. In some embodiments, the locations are not unique.
  • the UE 504, 524 knows the plurality of locations and can apply blind decoding to decode the right location.
  • the information transmitted by the BSs 502, 522 can be employed by the UE 504, 524 to determine the information carried in control channels.
  • the information carried in the control channels can include, but is not limited to, resource allocation information, information indicative of a start symbol for data, hybrid automatic repeat request identification information, information indicative of a number of control symbols and/or other control information.
  • the information transmitted by the BS 502, 522 can be transmitted by the physical control format indicator channel and/or the physical downlink control channel in various embodiments.
  • the BSs 502, 522 can inform the UEs 504, 524 through signaling on the reference signal, primary synchronization signal, secondary synchronization signal, pseudorandom sequence, reference signal, physical broadcast channel and/or other physical signal and/or channel.
  • the BSs 502, 522 can coordinate the transmission of the paging information and/or the system information. The coordination can be such that the same physical resource is used to facilitate interference cancellation and/or joint detection at UEs 504, 524. In some embodiments, the BSs 502, 522 can use a combination of the methods described herein.
  • BSs 502, 522 can include transceivers 506, 516 configured to transmit and receive data and/or control information and/or any other type of information described herein with reference to any of the systems, methods, apparatus and/or computer program products to and from BSs 502, 522, respectively.
  • Transceivers 506, 516 can be configured to transmit data and control channel information.
  • the transceivers 506, 516 can transmit downlink information at one or more locations.
  • the transmitted information can be detected by the UE 504, 524.
  • the UE 504, 524 can detect the downlink information using blind decoding.
  • BSs 502, 522 can also include processors 508, 528 and memory 510, 530.
  • Processors 508, 528 can be configured to perform one or more of the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.
  • the BSs 502, 522 can include memory 510, 530, respectively.
  • the memory 510, 530 can be for storing computer-executable instructions and/or information for performing the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.
  • BSs 502, 522 can also include BS resource allocation modules 512, 532 configured to allocate resources including, but not limited to, paging information, system information and/or unicast data information.
  • the BS resource allocation modules 512, 532 allocate the resources to a UE 504, 524 by transmitting the selected downlink information.
  • the BS resource allocation modules 512, 532 transmit a signal indicative of enabling or disabling a function, wherein the function is configured to transmit information carried in control channels using selected downlink information.
  • the BS 502, 522 transmit the selected downlink information at a plurality of locations, wherein the selected downlink information is configured to enable a UE to determine a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information.
  • the determination is made by the UEs 504 524 without decoding control channels corresponding to the selected downlink information, and in response to the BSs 502, 522 transmitting a signal to the UEs 504, 524 that is indicative of the function being enabled.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group.
  • the selected downlink information is transmitted on at least one of the physical control format indicator channel or the physical downlink control channel.
  • the one or more locations are not unique to one another.
  • at least one of a physical broadcast channel, a reference signal, a primary synchronization signal, a secondary synchronization signal, a primary broadcast channel or other physical signal includes the signal indicative of enabling or disabling a function.
  • the UEs 504, 524 are configured to determine the resource allocation of paging, system and/or unicast data information. If the function is enabled, the resource allocation is based, at least, on various parameters and the UEs 504, 524 do not need to decode control channels to get the resource allocation information.
  • the parameters include, but are not limited to, a cell identity, a system frame number, a cyclic prefix type, a number of transmit antenna, and/or a closed subscriber group flag.
  • the parameters are transmitted at different locations. If the locations are not unique, the UEs 504, 524 can be configured to attempt to decode the various channels at all possible locations employing blind decoding. The UEs 504, 524 can also be configured to decode control channels to decode the associated data channel, as is the case for UEs being configured according to the LTE Release 8 specification.
  • UEs 504, 524 can include transceivers 514, 534 configured to transmit and receive data and/or control information and/or any other type of information described herein with reference to any of the systems, methods, apparatus and/or computer program products to and from BSs 502, 522, respectively.
  • Transceivers 514, 534 can be configured to receive data and control channels and/or information thereon.
  • UEs 504, 524 can also include processors 516, 536 and memory 518, 538.
  • Processors 516, 536 can be configured to perform one or more of the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.
  • the UEs 504, 524 can include memory 518, 538 respectively.
  • the memory 518, 538 can be for storing computer-executable instructions and/or information for performing the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.
  • UEs 504, 524 can also include UE resource allocation modules 520, 540 configured to receive and process information carried in control channels including, but not limited to, resource allocation information, paging information, system information and/or unicast data information.
  • UE resource allocation modules 520, 540 can also be configured to process data and/or control information according to the resource allocations received from the BSs 502, 522, respectively.
  • the UE resource allocation modules 520, 540 are configured to receive a signal indicative of a base station enabling or disabling a function, wherein the function is configured to transmit information carried in control channels using selected downlink information.
  • the UE resource allocation modules 520, 540 are also configured to receive the selected downlink information at a plurality of locations, and determine a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information. In the present invention, the determining is performed without decoding control channels corresponding to the selected downlink information, and in response to receiving a signal indicative of the function being enabled.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group. In some embodiments, the selected downlink information is received on at least one of the physical control format indicator channel or the physical downlink control channel.
  • receiving downlink information comprises blind decoding at the one or more locations based, at least, on receiving the selected downlink information at at least two of the one or more locations.
  • At least one of a physical broadcast channel, primary synchronization signal, secondary synchronization signal, a reference signal, pseudorandom sequence and/or other physical signal includes the signal indicative of enabling or disabling a function.
  • the UE resource allocation modules 520, 540 are configured to, receive a signal indicative of coordinated information.
  • the coordinated information can include at least two of paging, system information and/or unicast data information.
  • the UE resource allocation modules 520, 540 can also be configured to perform processing using a same physical resource based, at least, on the coordinated information.
  • the processing comprises interference cancellation.
  • the processing comprises joint detection.
  • FIG. 6 is a flowchart of a method for facilitating communication of DL information in accordance with various aspects set forth herein.
  • method 600 includes a UE receiving a signal indicative of a BS enabling or disabling a function.
  • the function is configured to transmit information carried in the control channel using selected downlink information.
  • method 600 includes receiving the selected downlink information at a plurality of locations.
  • method 600 includes determining a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information. In the present invention, determining is performed without decoding control channels corresponding to the selected downlink information and in response to receiving a signal indicative of the function being enabled.
  • control channels that the UE does not need to decode include the physical control format indicator channel and/or the physical downlink control channel.
  • the physical control format indicator channel can inform the UE of the start symbol for the data
  • the physical downlink control channel can inform the UE of the resource allocation, hybrid automatic repeat request identification information and/or other control information.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group.
  • receiving downlink information comprises blind decoding at the one or more locations based, at least, on receiving the selected downlink information at at least two of the one or more locations.
  • At least one of a physical broadcast channel, primary synchronization signal, a secondary synchronization signal, a pseudorandom sequence, a reference signal and/or another physical signal or channel includes the signal indicative of enabling or disabling a function.
  • FIG. 7 is a flowchart of a method for facilitating communication of DL information in accordance with various aspects set forth herein.
  • method 700 includes transmitting a signal indicative of enabling or disabling a function, wherein the function is configured to transmit information carried in the control channels using selected downlink information.
  • method 700 includes transmitting the selected downlink information at a plurality of locations.
  • the selected downlink information is configured to enable a user equipment to determine a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information, wherein the determining is performed without decoding control channels corresponding to the selected downlink information in response to transmitting a signal indicative of the function being enabled.
  • the physical control format indicator channel can inform the UE of the start symbol for the data, and the physical downlink control channel can inform the UE of the resource allocation, hybrid automatic repeat request identification information and/or other control information.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group.
  • the one or more locations are not unique to one another.
  • at least one of a physical broadcast channel or a reference signal includes the signal indicative of enabling or disabling a function.
  • FIG. 8 is a flowchart of a method for facilitating communication of DL information in accordance with various aspects set forth herein.
  • method 800 can include receiving a indicative of coordinated information, wherein the coordinated information includes at least two of paging information, system information or unicast data information.
  • method 800 can include performing processing using a same physical resource based, at least, on the coordinated information.
  • the processing comprises interference cancellation. In some embodiments, the processing comprises joint detection.
  • FIG. 9 is an illustration of a block diagram of an example system of facilitating communication of DL information in accordance with various aspects set forth herein. It is to be appreciated that system 900 is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, hardware, software, firmware, or combination thereof.
  • System 900 can include a logical or physical grouping 902 of electrical components.
  • logical or physical grouping 902 can include an electrical component 904 for receiving a signal indicative of a base station enabling or disabling a function, wherein the function is configured to transmit information carried in the control channel using selected downlink information.
  • Logical or physical grouping 902 can also include an electrical component 906 for receiving the selected downlink information at one or more locations.
  • Logical or physical grouping 902 can also include an electrical component 908 for determining a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information, wherein the determining is performed without decoding control channels corresponding to the selected downlink information in response to receiving a signal indicative of the function being enabled.
  • the control channels that do not need to be decoded include the physical control format indicator channel and/or the physical downlink control channel.
  • the physical control format indicator channel can inform the UE of the start symbol for the data, and the physical downlink control channel can inform the UE of the resource allocation, hybrid automatic repeat request identification information and/or other control information.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group.
  • receiving downlink information comprises blind decoding at the one or more locations based, at least, on receiving the selected downlink information at at least two of the one or more locations.
  • at least one of a physical broadcast channel or a reference signal includes the signal indicative of enabling or disabling a function.
  • the logical or physical grouping 902 can also include an electrical component 910 for storing.
  • the electrical component 910 for storing can be configured to downlink information, locations, resource allocation information and/or DL data or control channel information, generally.
  • FIG. 10 is an illustration of a block diagram of an example system facilitating communication of DL information in accordance with various aspects set forth herein. It is to be appreciated that system 1000 is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, hardware, software, firmware, or combination thereof. System 1000 can include a logical or physical grouping 1002 of electrical components for facilitating the communication.
  • the electrical components can act in conjunction.
  • the logical or physical grouping 1002 can include an electrical component 1004 for transmitting a signal indicative of enabling or disabling a function, wherein the function is configured to transmit information carried in the control channel using selected downlink information.
  • the logical or physical grouping 1002 can also include an electrical component 1006 for transmitting the selected downlink information at one or more locations, wherein the selected downlink information is configured to enable a user equipment to determine a resource allocation of at least one of paging information or system information or unicast data information based, at least, on the selected downlink information, wherein the determining is performed without decoding control channels corresponding to the selected downlink information in response to transmitting a signal indicative of the function being enabled.
  • the control channels that do not need to be decoded include the physical control format indicator channel and/or the physical downlink control channel.
  • the physical control format indicator channel can inform the UE of the start symbol for the data
  • the physical downlink control channel can inform the UE of the resource allocation, hybrid automatic repeat request identification information and/or other control information.
  • the selected downlink information is information indicative of at least one of a cell identity, a system frame number, a cyclic prefix type or a closed subscriber group.
  • the one or more locations are not unique to one another.
  • at least one of physical broadcast channel or a reference signal includes the signal indicative of enabling or disabling a function.
  • the logical or physical grouping 1002 can include an electrical component 1108 for storing.
  • the electrical component 1108 for storing can be configured to store paging, system and/or unicast data information, information indicative of cell identity, a system frame number, a cyclic prefix type or a closed subscriber group and/or resource allocation information.
  • FIG. 11 is an illustration of a block diagram of an example system facilitating communication of DL information in accordance with various aspects set forth herein. It is to be appreciated that system 1100 is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, hardware, software, firmware, or combination thereof. System 1100 can include a logical or physical grouping 1102 of electrical components for facilitating the frequency reuse.
  • the electrical components can act in conjunction.
  • the logical or physical grouping 1102 can include an electrical component 1104 for receiving a signal indicative of coordinated information.
  • the coordinated information can include at least two of paging information, system information or unicast data information.
  • the logical or physical grouping 1102 can also include an electrical component 1106 for performing processing using a same physical resource based, at least, on the coordinated information.
  • the processing comprises interference cancellation. In some embodiments, the processing comprises joint detection.
  • the logical or physical grouping 1102 can include an electrical component 1108 for storing.
  • the electrical component 1108 for storing can be configured to store paging, system or unicast data information, physical resource information, information for interference cancellation and/or information for joint detection.
  • a wireless multiple-access communication system can simultaneously support communication for multiple wireless access terminals.
  • each terminal can communicate with one or more BSs via transmissions on the forward and reverse links.
  • the forward link (or downlink) refers to the communication link from the BSs to the terminals
  • the reverse link (or uplink) refers to the communication link from the terminals to the BSs.
  • This communication link can be established via a single-in-single-out system, a multiple-in-multiple-out (MIMO) system, or some other type of system.
  • MIMO multiple-in-multiple-out
  • a MIMO system employs multiple ( N T ) transmit antennas and multiple ( N R ) receive antennas for data transmission.
  • a MIMO channel formed by the N T transmit and N R receive antennas can be decomposed into N S independent channels, which are also referred to as spatial channels, where N S ⁇ min ⁇ N T , N R ⁇ .
  • Each of the N S independent channels corresponds to a dimension.
  • the MIMO system can provide improved performance (e.g., higher throughput and/or greater reliability) if the additional dimensionalities created by the multiple transmit and receive antennas are utilized.
  • a MIMO system can support time division duplex (TDD) and frequency division duplex (FDD).
  • TDD time division duplex
  • FDD frequency division duplex
  • the forward and reverse link transmissions are on the same frequency region so that the reciprocity principle allows the estimation of the forward link channel from the reverse link channel. This enables the access point to extract transmit beam-forming gain on the forward link when multiple antennas are available at the access point.
  • FIG. 12 shows an example wireless communication system in which the embodiments described herein can be employed in accordance with various aspects set forth herein.
  • the teachings herein may be incorporated into a node (e.g., a device) employing various components for communicating with at least one other node.
  • FIG. 12 depicts several sample components that may be employed to facilitate communication between nodes.
  • FIG. 12 illustrates a wireless device 1210 (e.g., an access point) and a wireless device 1250 (e.g., an access terminal) of a wireless communication system 1200 (e.g., MIMO system).
  • a wireless device 1210 e.g., an access point
  • a wireless device 1250 e.g., an access terminal
  • a wireless communication system 1200 e.g., MIMO system
  • each data stream is transmitted over a respective transmit antenna.
  • the TX data processor 1214 formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to provide coded data.
  • the coded data for each data stream may be multiplexed with pilot data using OFDM techniques.
  • the pilot data is typically a known data pattern that is processed in a known manner and may be used at the receiver system to estimate the channel response.
  • the multiplexed pilot and coded data for each data stream is then modulated (i.e., symbol mapped) based on a particular modulation scheme (e.g., BPSK, QSPK, M-PSK, or M-QAM) selected for that data stream to provide modulation symbols.
  • the data rate, coding, and modulation for each data stream may be determined by instructions performed by a processor 1230.
  • a data memory 1232 may store program code, data, and other information used by the processor 1230 or other components of the device 1210.
  • the modulation symbols for all data streams are then provided to a TX MIMO processor 1220, which may further process the modulation symbols (e.g., for OFDM).
  • the TX MIMO processor 1220 then provides N T modulation symbol streams to N T transceivers (XCVR) 1222A through 1222T.
  • XCVR N T transceivers
  • the TX MIMO processor 1220 applies beam-forming weights to the symbols of the data streams and to the antenna from which the symbol is being transmitted.
  • Each transceiver 1222 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel.
  • N T modulated signals from transceivers 1222A through 1222T are then transmitted from N T antennas 1224A through 1224T, respectively.
  • the transmitted modulated signals are received by N R antennas 1252A through 1252R and the received signal from each antenna 1252 is provided to a respective transceiver (XCVR) 1254A through 1254R.
  • Each transceiver 1254 conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding "received" symbol stream.
  • a receive (RX) data processor 1260 then receives and processes the N R received symbol streams from N R transceivers 1254 based on a particular receiver processing technique to provide N T "detected" symbol streams.
  • the RX data processor 1260 then demodulates, deinterleaves, and decodes each detected symbol stream to recover the traffic data for the data stream.
  • the processing by the RX data processor 1260 is complementary to that performed by the TX MIMO processor 1220 and the TX data processor 1214 at the device 1210.
  • a processor 1270 periodically determines which pre-coding matrix to use (discussed below). The processor 1270 formulates a reverse link message comprising a matrix index portion and a rank value portion.
  • a data memory 1272 may store program code, data, and other information used by the processor 1270 or other components of the device 1250.
  • the reverse link message may comprise various types of information regarding the communication link and/or the received data stream.
  • the reverse link message is then processed by a TX data processor 1238, which also receives traffic data for a number of data streams from a data source 1236, modulated by a modulator 1280, conditioned by the transceivers 1254A through 1254R, and transmitted back to the device 1210.
  • the modulated signals from the device 1250 are received by the antennas 1224, conditioned by the transceivers 1222, demodulated by a demodulator (DEMOD) 1240, and processed by a RX data processor 1242 to extract the reverse link message transmitted by the device 1250.
  • the processor 1230 determines which pre-coding matrix to use for determining the beam-forming weights then processes the extracted message.
  • FIG. 12 also illustrates that the communication components may include one or more components that perform interference control operations as taught herein.
  • an interference (INTER.) control component 1290 may cooperate with the processor 1230 and/or other components of the device 1210 to send/receive signals to/from another device (e.g., device 1250) as taught herein.
  • an interference control component 1292 may cooperate with the processor 1270 and/or other components of the device 1250 to send/receive signals to/from another device (e.g., device 1210).
  • a single processing component may provide the functionality of the interference control component 1290 and the processor 1230 and a single processing component may provide the functionality of the interference control component 1292 and the processor 1270.
  • Logical Control Channels can include a Broadcast Control Channel (BCCH), which is a DL channel for broadcasting system control information. Further, Logical Control Channels can include a Paging Control Channel (PCCH), which is a DL channel that transfers paging information. Moreover, the Logical Control Channels can include a Multicast Control Channel (MCCH), which is a Point-to-multipoint DL channel used for transmitting Multimedia Broadcast and Multicast Service (MBMS) scheduling and control information for one or several Multicast Traffic Channels (MTCHs).
  • BCCH Broadcast Control Channel
  • PCCH Paging Control Channel
  • MCCH Multicast Control Channel
  • MBMS Multimedia Broadcast and Multicast Service
  • the Logical Control Channels can include a Dedicated Control Channel (DCCH), which is a Point-to-point bi-directional channel that transmits dedicated control information and can be used by UEs having a RRC connection.
  • DCCH Dedicated Control Channel
  • the Logical Traffic Channels can comprise a Dedicated Traffic Channel (DTCH), which is a Point-to-point bi-directional channel dedicated to one UE for the transfer of user information.
  • DTCH Dedicated Traffic Channel
  • the Logical Traffic Channels can include an MTCH for Point-to-multipoint DL channel for transmitting traffic data.
  • Transport Channels are classified into DL and UL.
  • DL Transport Channels can include a Broadcast Channel (BCH), a Downlink Shared Data Channel (DL-SDCH) and a Paging Channel (PCH).
  • BCH Broadcast Channel
  • DL-SDCH Downlink Shared Data Channel
  • PCH Paging Channel
  • the PCH can support UE power saving (e.g., Discontinuous Reception (DRX) cycle can be indicated by the network to the UE) by being broadcasted over an entire cell and being mapped to Physical layer (PHY) resources that can be used for other control/traffic channels.
  • the UL Transport Channels can comprise a Random Access Channel (RACH), a Request Channel (REQCH), an Uplink Shared Data Channel (UL-SDCH) and a plurality of PHY channels.
  • RACH Random Access Channel
  • REQCH Request Channel
  • UL-SDCH Uplink Shared Data Channel
  • the PHY channels can include a set of DL channels and UL channels.
  • the DL PHY channels can include: Common Pilot Channel (CPICH); Synchronization Channel (SCH); Common Control Channel (CCCH); Shared DL Control Channel (SDCCH); Multicast Control Channel (MCCH); Shared UL Assignment Channel (SUACH); Acknowledgement Channel (ACKCH); DL Physical Shared Data Channel (DL-PSDCH); UL Power Control Channel (UPCCH); Paging Indicator Channel (PICH); and/or Load Indicator Channel (LICH).
  • CPICH Common Pilot Channel
  • SCH Common Control Channel
  • CCCH Common Control Channel
  • SDCCH Shared DL Control Channel
  • MCCH Multicast Control Channel
  • SUACH Shared UL Assignment Channel
  • ACKCH Acknowledgement Channel
  • DL-PSDCH DL Physical Shared Data Channel
  • UPCH UL Power Control Channel
  • PICH Paging Indicator Channel
  • LICH Load Indicator Channel
  • the UL PHY Channels can include: Physical Random Access Channel (PRACH); Channel Quality Indicator Channel (CQICH); Acknowledgement Channel (ACKCH); Antenna Subset Indicator Channel (ASICH); Shared Request Channel (SREQCH); UL Physical Shared Data Channel (UL-PSDCH); and/or Broadband Pilot Channel (BPICH).
  • PRACH Physical Random Access Channel
  • CQICH Channel Quality Indicator Channel
  • ACKCH Acknowledgement Channel
  • ASICH Antenna Subset Indicator Channel
  • SREQCH Shared Request Channel
  • UL-PSDCH UL Physical Shared Data Channel
  • BPICH Broadband Pilot Channel
  • the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof.
  • the processing units can be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors and/or other electronic units designed to perform the functions described herein, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • processors controllers, micro-controllers, microprocessors and/or other electronic units designed to perform the functions described herein, or a combination thereof.
  • a code segment can represent a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class, or any combination of instructions, data structures, or program statements.
  • a code segment can be coupled to another code segment or a hardware circuit by passing and/or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, etc. can be passed, forwarded, or transmitted using any suitable means including memory sharing, message passing, token passing, network transmission, etc.
  • the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein.
  • the software codes can be stored in memory units and executed by processors.
  • the memory unit can be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.

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